Scientific Name:
Conyza canadensis (L.) Cronq.
Common names: fleabane, mare’s-tail, horseweed, butterweed;
Synonyms:
Leptilon canadense (L.), Britton Erigeron canadensis L. (Mulligan 1992),
:
INTRODUCTION
Conyza Canadensis Linn. belongs to the family Compositae. It is also known as fleabane and horseweed. It is widely dispersed in pakistan including Punjab, Western Himalayas and Kashmir. It was originated from North America. It can be seen everywhere in meadows, gardens and fields. It is an annual herb and commonly considered as a weed.
It is an annual herb and growth starts in a rosette pattern of the leaves. However, when flowering starts , the stem become erect and rigid.
It has become a problematic weed …show more content…
Several secondary metabolites including triterpenoids, sphingolipids, acetylenes, steroids and phenolic acids were identified and isolated from the plant extract (Mukhtar, Iqbal et al. 2002; Xie, Gao et al. 2007) . HISTORY:
Origin of C. Canadensis is America (North) (Cronquist 1943; Frankton and Mulligan 1987) although now wide spread in many countries. It is most abundant specie in North America (Thebaud and Abbott 1995). Seeds are light weight. Water and wind are two means of dispersion of its seeds. Salisbury(1942) pointed out C. canadensis was introduced in London during 2nd world war. And it was among 6 other species which were distributed by bombing there.
Habitat:
C. Canadensis can be commonly seen in wetland areas and in grasslands. In the middle of 17th century It was introduced into Europe, along with Canadian furs through shipping in France.
Canadian horseweed can adapt wide range of soil types and environmental conditions. However it shoes best growth in acidic to neutral soil with a PH of 4.8-7.2. Seeds are produced in large number and are dispersed easily by wind because of light weight (Regehr and Bazzaz …show more content…
Only specie which is although harmful but also useful is C. Canadensis.
Cultivation:
The plants preferentially grow in full sun in dry weather and fertile soil. The plant can also grow in soil that has high content of clay or gravel. Moisture condition and soil fertility affect growth of plant. It usually develops rapidly in summer. It can resist to summer drought, although some of the lower leaves may turn yellow and fall away. It can reseed excessively in sunny locations with exposed top soil.
BOTANICAL OVERVIW:
Horseweed is an annual herb and grows both in summer or winter. Basal rosette of dark green hairy leaves are formed from seedlings. Leaves are thin and width is less then 1cm having toothed margins and distinct petioles.
When stem starts to elongate, basal rosettes detoriate.
Horsrweed’s plant is about 1-7' in height and stem is usually unbranched, however flowering stems are present near the top. central stem is rigid and errectand is about 10-180cm. It has small flowering branches at the top portions, it is covered with long white
Conyza canadensis (L.) Cronq.
Common names: fleabane, mare’s-tail, horseweed, butterweed;
Synonyms:
Leptilon canadense (L.), Britton Erigeron canadensis L. (Mulligan 1992),
:
INTRODUCTION
Conyza Canadensis Linn. belongs to the family Compositae. It is also known as fleabane and horseweed. It is widely dispersed in pakistan including Punjab, Western Himalayas and Kashmir. It was originated from North America. It can be seen everywhere in meadows, gardens and fields. It is an annual herb and commonly considered as a weed.
It is an annual herb and growth starts in a rosette pattern of the leaves. However, when flowering starts , the stem become erect and rigid.
It has become a problematic weed …show more content…
Several secondary metabolites including triterpenoids, sphingolipids, acetylenes, steroids and phenolic acids were identified and isolated from the plant extract (Mukhtar, Iqbal et al. 2002; Xie, Gao et al. 2007) . HISTORY:
Origin of C. Canadensis is America (North) (Cronquist 1943; Frankton and Mulligan 1987) although now wide spread in many countries. It is most abundant specie in North America (Thebaud and Abbott 1995). Seeds are light weight. Water and wind are two means of dispersion of its seeds. Salisbury(1942) pointed out C. canadensis was introduced in London during 2nd world war. And it was among 6 other species which were distributed by bombing there.
Habitat:
C. Canadensis can be commonly seen in wetland areas and in grasslands. In the middle of 17th century It was introduced into Europe, along with Canadian furs through shipping in France.
Canadian horseweed can adapt wide range of soil types and environmental conditions. However it shoes best growth in acidic to neutral soil with a PH of 4.8-7.2. Seeds are produced in large number and are dispersed easily by wind because of light weight (Regehr and Bazzaz …show more content…
Only specie which is although harmful but also useful is C. Canadensis.
Cultivation:
The plants preferentially grow in full sun in dry weather and fertile soil. The plant can also grow in soil that has high content of clay or gravel. Moisture condition and soil fertility affect growth of plant. It usually develops rapidly in summer. It can resist to summer drought, although some of the lower leaves may turn yellow and fall away. It can reseed excessively in sunny locations with exposed top soil.
BOTANICAL OVERVIW:
Horseweed is an annual herb and grows both in summer or winter. Basal rosette of dark green hairy leaves are formed from seedlings. Leaves are thin and width is less then 1cm having toothed margins and distinct petioles.
When stem starts to elongate, basal rosettes detoriate.
Horsrweed’s plant is about 1-7' in height and stem is usually unbranched, however flowering stems are present near the top. central stem is rigid and errectand is about 10-180cm. It has small flowering branches at the top portions, it is covered with long white